I have been connecting and trying to find out ways to gain funding or a loan for a 35k tax deed without clean title.

that's why high turnover is so expensive - you're patching things up / cleaning up / and then paying another month's rent just to get it rented on top of any vacancy.and again - that's just hypothetical math. 

Our policies clearly state 4 PM check in, and I couldn't accommodate an early check in anyway because the previous guests were still there and had until 10 AM to check out, then the house needed cleaning.

I've done camera work and the plumber said they see light root growth, but I could clean the pipes annually to prevent growth and back ups.

And how are you cleaning in 10 minutes???

I know cat urine can be extremely tough to get rid of and will have to possibly sand and deep clean floors and then seal them.Main question: Is it possible to fully remove the smell of cat urine?

It integrates very well with many other programs (Resort Cleaning, Pricelabs, Smartlocks like the Schlage Encode, etc). 

The tenant who wants to return has also been a very good paying and clean tenant.

The house is in really good shape and the area looks fairly clean, but a couple people I've talked to have a lot of concerns of that area which is giving me second thoughts... any other locals able to shed some light?

Your financials don't account for maintenance, collecting coins, cleaning, or any of the other work involved.